>> bill graham told me this a long time ago. >> brown: the great promoter. >> he says-- bill graham says, "you give voice to the invisible ones." you know, so like delores >> brown: you are 66 now? and i see you are still you are going to africa soon to continue touring do you see a point where you might stop all this? >> no way it's just getting starting. it's getting better, you know, we finally crystallized what we're really about. we used to be seekers now we're finders. >> brown: carlos santana, thank you for talking to us and congratulations. >> woodruff: sometimes there are wonderful moments that don't make the final cut when we edit a story like the one you just watched. we're going to show you one right now. their interview was taped the morning after nelson mandela's death. carlos santana has long supported the fight against aids in south africa. in 2003, he donated all of his tour proceeds-- $2 million-- to "artists for a new south africa." he began his support of that group in 1989 when its focus was to combat apartheid. >> we were talking just after nelson mandela has died.